May 7, 2025 | Sierra Rec Magazine

As Lake Tahoe gears up for the 2025 boating season, boaters and paddlers are facing critical new protocols aimed at protecting one of the Sierra’s most iconic and fragile lakes.

Starting now, mandatory decontaminations are required for all motorized boats arriving from outside the Tahoe Basin, in response to an alarming new threat: the golden mussel, a rapidly spreading aquatic invasive species recently found in boats on Folsom Lake and the Sacramento-San Joaquin Delta.

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A Tahoe watercraft inspector sprays an incoming boat with high pressure, high temperature water at the aquatic invasive species inspection station in Meyers, Calif.
Credit: McKenzie Koch

“This is not business as usual,” warns Thomas Boos, TRPA Aquatic Invasive Species Program Manager. “The proximity and biology of golden mussels make them the greatest invasive species threat Lake Tahoe has ever faced.

Golden mussels detected on a boat traveling from the Sacramento-San Joaquin Delta to Lake Berryessa. Under new California requirements, the vessel was denied launch.
Credit: Solano County Water Agency

Why It Matters:

Golden mussels, a small yellowish-brown shellfish, are incredibly destructive. Once introduced, they spread rapidly, clog infrastructure, strip nutrients from the water, and permanently damage ecosystems. Their presence in the Sacramento Delta last year marked the first recorded infestation in North America—and Lake Tahoe is now just a few hours’ tow away.

Invasive species experts say Lake Tahoe’s world-renowned clarity, recreation, and biodiversity could be irreversibly damaged if mussels arrive and establish a foothold.

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Do Your Part — Arrive Clean, Drained, and Dry

This isn’t just good etiquette—it’s now the difference between being allowed on the water or being turned away.

✔️ Clean off all visible mud, plants, and debris
✔️ Drain all water from your boat and equipment
✔️ Dry completely before arrival

Extra Resources:

  • TahoeBoating.org: Download the free app for interactive maps, no-wake zones, and AIS info
  • TahoeKeepers.org: Paddleboarders, kayakers, anglers—complete your AIS training and join the Tahoe Keepers
  • TahoeBoatInspections.com: Book appointments, review fees, and get updates on statewide boating restrictions

Let’s keep Lake Tahoe blue—and mussel-free. The extra time and cost this year is a small price to pay to protect a place we all love.

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